The figure below demonstrates which key concept regarding cell activities?

- enzyme inhibition
- the first law of thermodynamics
- coupled reactions
- active transport
- receptor-mediated endocytosis


coupled reactions

Biology & Microbiology

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Which of the following pathogens produce enterotoxins?

A) Bacillus cereus and certain serotypes of E. coli B) Clostridium difficile and Clostridium perfringens C) Salmonella spp. and Shigella spp. D) all of the above

Biology & Microbiology

The ____ contains hydrolytic enzymes for the digestion of proteins, lipids, nucleic acids, and

polysaccharides.

a. Golgi complex b. rough endoplasmic reticulum c. nucleus d. peroxisome e. lysosome

Biology & Microbiology

Choanoflagellates and sponge choanocyte cells bear a strong resemblance to each other. What would disprove the hypothesis that choanoflagellates and sponges are closely related?

a. large gaps in the fossil record b. alternation of generations in sponges c. significant differences in nuclear DNA d. they’re different colors in this illustration

Biology & Microbiology

If a plant were placed in continual darkness, it would continue to open and close its stomata at approximately the same

time each day. This phenomenon is governed by: a. annual rhythms. b. floral clocks. c. transpiration. d. temporal mechanisms. e. circadian rhythms.

Biology & Microbiology